Edgar ford morris



Patented Oct. 6, 1925.

UNITED STATES PATENT, OFFICE.

EDGAR roRD MORRIS, or MANCHESTER, ENGLAND, ASSIGNOR 0F ONE-HALF To JAMESANDERSON MORRICE, or GLASGOW, SCOTLAND.

.COATING FOR THE PREVENTION OF RUST OR THE LIKE.

No Drawing.

To all whom it may concern:

Be it known that I, EDGAR FoRD MORRIS, a subject of the King of GreatBritain, residing at Manchester, in the county of Lancaster, England,have invented new and useful Improvements in Coatings for the Preventionof Rust or the like, of which the following is a specification.

The invention relates to improvements in or relating to the preventionof rust or the like and has for its object to provide a method orprocess whereby iron or other ferrous metal which need not be thoroughlycleaned may be more effectively protected from the action of rust. y

In carrying my invention into efiect I first coat or cover the materialwith an aqueous emulsion prepared from a paintv containing zinc yellow(basic chromate of zinc) that is to say, forexample a paint composed ofthe following ingredients mixed or combined in or about the proportionsstated viz :20% zinc yellow, 5% Prussian blue, 75% fillers such as thefinest barytes ground into a suitable paint vehicle such as linseed oil,and to this is added glue or gum dissolved in water to which mixture Imay add the usual volatile thinners. The preparation of the abovecoating or emulslon consisting of zinc yellow paint plus water plus glueorother emulsifioation agent with permissible addition of volatilethinners e. g. turpentine or white spirit, may be varied in anyconvenient manner, and after the emulsion has been allowed to dry on themetal a contact is secured with the metal even if it should be, to acertain extent, damp or not quite clean. I then apply a Applicationfiled October 7, 1924. Serial No. 742,267.

second coating consisting of any suitable paint, preferably containingzinc yellow, such as one consisting of 20% zinc yellow, 5% Prussianblue, 75% fillers such as the finest barytes ground into a suitablepaint vehicle such as linseed oil.

I have discovered that by treating the ferrous metal in the manner abovedescribed when employing the known inhibitent of rusting, zinc yellow,iron or other ferrous metal may be protected even if it is rusted beforetreatment.

By the means hereinbefore described ferrous metal may be protected fromrust and the paint caused to adhere thereto more efiiciently thanheretofore.

What I claim as my invention and desire 5 to secure by Letters Patentis 1. The process for preventing the formation of rust on iron or otherferrous metals which consists in first coating the metal with an aqueousemulsion prepared from a paint containing zinc yellow (basic chromate ofzinc) to which has been added an emulsifying agent dissolved in waterand a volatile thinner and allowing said coating to dry and thenapplying a second coating consisting of a paint containing zinc yellow.

2. In the process claimed in claim 1 the use of an oil paint adapted tobe applied to the metal after the aqueous solution has dried consistingof 20% zinc yellow, 5% 7 Prussian blue, and fillers ground into avehicle such as linseed oil.

In testimony whereof I have signed my name to this specification.

EDGAR FORD MORRIS.

